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Why isn't anyone useing the SIII SIGHTRON 6-24x50 side focus

 
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  #22  
Old 07-19-2009, 08:39 PM
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Re: Why isn't anyone useing the SIII SIGHTRON 6-24x50 side focus

Hi guys, Newb here, just trying to learn more about scopes for a future purchase. I heard somewhere the sightrons clicks are way different than most other scopes, is this true and is it a problem?
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  #23  
Old 07-19-2009, 11:57 PM
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Re: Why isn't anyone useing the SIII SIGHTRON 6-24x50 side focus

The SIII clicks are advertised as 0.250"/click at 100yds. Mine are 0.273"/click at 100 yds. The turrets are covered with metal caps which unscrew like lots of other scopes. I don't know of anything way different about the SIII clicks from other scopes.
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  #24  
Old 02-10-2013, 02:15 PM
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Re: Why isn't anyone useing the SIII SIGHTRON 6-24x50 side focus

I recently determined the actual vertical turret movement value in all three of my Sightron SIII 6-24x50mm scopes. Two have the Mildot reticle and one has the relatively recent 2-MOA reticle.

Here’s what I determined:

The 2MOA reticle scope has a 0.12% error (excess reticle movement). This equals a Click Value of 0.2621"/Click @ 100yds.
1st Mildot reticle scope has a 4.92% error (excess reticle movement). This equals a Click Value of 0.2747"/Click @ 100yds.
2nd Mildot reticle scope has a 6.84% error (excess reticle movement). This equals a Click Value of 0.2797"/Click @ 100yds.

So two of my SIIIs have vertical turret adjustments that are substantially greater than the advertised 0.25 MOA per click. 0.25 MOA is equal to 0.2618" @ 100yds. However all three track consistently and return to zero properly and consistently. They just adjust POI a bit more than their advertised per/click values.

Sightron SIIIs should be tested in order to determine the actual vertical turret values, if you're turning turrets to establish your zero for long range targets.

Last edited by phorwath; 02-10-2013 at 05:08 PM.
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  #25  
Old 02-11-2013, 11:19 AM
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Re: Why isn't anyone useing the SIII SIGHTRON 6-24x50 side focus

Wow, this thread was dug up out of the cellar!
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  #26  
Old 02-11-2013, 11:33 AM
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Re: Why isn't anyone useing the SIII SIGHTRON 6-24x50 side focus

Some get better with age...
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  #27  
Old 02-14-2013, 06:04 PM
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Re: Why isn't anyone useing the SIII SIGHTRON 6-24x50 side focus

Some of the old posts that get resurrected are often because of relevant information,

I used the search function to get as much info on the Sightron SIII as I could, specifically the newer 6-24x50 2moa,

I ordered the scope from Liberty a day ago..

I am a Vortex user but chose the Sightron... because of the high praise here on LRH and other forums..
Hope all you guys didn't lead me astray...LOL

My question is ...

I also ordered a 40 moa Nightforce mount and will go with Nightforce Ultra Light rings, I want to keep the scope as low as possible, my barrel is a Rock Creek AMU contour on a REM700...

Will the medium work or do I need to go up one ?
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  #28  
Old 02-14-2013, 06:38 PM
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Re: Why isn't anyone useing the SIII SIGHTRON 6-24x50 side focus

Quote:
Originally Posted by Swamplord View Post
I used the search function to get as much info on the Sightron SIII as I could, specifically the newer 6-24x50 2MOA,

My question is ...

I also ordered a 40 moa Nightforce mount and will go with Nightforce Ultra Light rings, I want to keep the scope as low as possible, my barrel is a Rock Creek AMU contour on a REM700...

Will the medium work or do I need to go up one ?
I've not used the Nightforce Ultra Light rings. What I can offer that might assist is that I use Seekins Precision 'Low' rings for all three of my SIII 6-24x50mm scopes. One of those is on a Rem 700 action. One on a Lawton 7000. One on a Tikka T3 Lite. The scopes' objective bells clear the barrels on all three of my rifles. I believe the Seekins Precision Low rings are 0.870" from the base that rests on the Picatinny rail to the centerline of the scope rings. That could be confirmed by visiting the Seekins web site. I can confirm some things tonight, like the diameter of my barrel, the height of my rings from the Picatinny base to the centerline, and where the objective bell of the SIII is located relative to the chamber portion of my barrels. Can send you a picture of my setup if you'd like. If you know the distance of the NightForce rings from Picatinney rail to centerline, and the size of your barrel versus mine, you should be able to get a pretty good idea.
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